Electrically operated refrigerating unit



April 19, 1932. w. w. WILLIAMS ELECTRICALLY OPERATED REFRIGERATING UNIT Filed Nov. 11, 1929 2 Sheets-Sheet l INVENTOR WHL TER 14 MLL/AMS. 7 ATTORNEY Patented A r. 19,1932

UNITED STATES PATENT OFFICE WALTER W. WILLIAMS, OF BLOOMINGTON, ILLINOIS, .ASIGNOR TO WILLIAMS OIL-O- IATIC HEATING CORPORATION, OF BLOOMINGTON, ILLINOIS, A CORPORATION OF ILLINOIS ELEOTRICALLY OPERATED REFRIGERATING UNIT Application filed November 11, 1929. Serial No. 406,234.

This invention relates to electrically operated refrigerating units and more particular.

1 to the construction and location of the con- (fenser of such a unit as applied to domestic 5 refrigerators employing an ice box of commercial size for use in the home.

It is an object of this invention to so construct the compressor and condenser that they may both be mounted as a complete unit 1 upon a common base which base may be supported either upon the exterior of the upper side of the ice box or cabinet, upon the bottom of the lower compartment usually provided in cabinets constructed for electrical 1 refrigeration or in the basement or wherever desired in the dwelling, and connected by pipes leading to the evaporator unit'supported within the cold compartment of the cabinet or ice box. It is a further object of this invention to enclose the compressor and electric motor therefore within a dome supporte'd upon a base and support the condenser upon one side of a casing or jacket completely surrounding and spaced apart from the dome having an opening in the top thereof directly above the dome, whereby the heat created within the dome by the operation of the motor and compressor causes the atmosphere in the space between the exterior of the doineand the casing to rise and pass through the opening in the top of the casing and the air currents thus created draws atmospheric air into the casing through the coilsof the condenser.

The advantages of this particular construction and arrangement are-that when the condenser comprises a series of coil spaced apart and arranged in parallel relation to each other in theform of a radiator less condenser surface is required as a more intensive draft or current of air is set up by this construction than by providing a series of coils wound about the dome as shown in the prior art. The compact unit construction of the compressor and condenser allow the ready conversion of a commercial ice box in use to an electrically operated unit by installing the evaporator or cold producing unit in the ice compartment of such an ice box and connect it to the compressor-condenser unit, which unit may be located exteriorly of the ice box, such as on top in the cellar or in an adjoining room.

it-h these and other objects in view reference is made to the accompanying sheets of drawings which illustrate a preferred form of this invention.

In the drawings:

Figure 1 is a perspective view of an electrically operated domestic refrigerating cab inet in which the base supporting the motor and compressor within a dome are surrounded by a jacket or casing supporting the condenser in the form of a radiator section upon one side thereof is located u on the exterior of the upper side of the ca inet.

Figure 2 is a similar view of an electrically operated domestic refrigerating. cabinet in which the base supporting the above mentioned "elements rests upon thebottorn of the 70 lowercompartment customary in such cabinets for the reception of the electrically operated refrigerating device,-the doors of the cabinet being shown open show the connections fromthe compressor and. condenser in the lower compartment to the evaporator or cooling unit suspended from the top of the upper compartment.

Flgure 3 is an enlarged detail bottom plan view of the supporting base illustrating the connections to the. evaporator or cooling unit with the compressor and condenser, and other parts mounted within said base.

section illustrated in Figure 4; and illustrates the motor in side elevation.

The compressor mechanism includes a pan 1 which is flanged to receive a dome 2. Between the dome and the pan a motor "3 is mounted upon springs resting upon the pan. Directly built on' the end of the motor is the compressor unit 4. The dome and pan are supported upon a circular supporting base 5, as shown in Figures 1 and 2, which base is flattened at the back for the purpose of securing thereto an electric conduit box 6. Resting upon the base and spaced apart from the dome is a cylindrical casing or jacket 7 having an opening 8 in the top thereof directly above the center of the dome; This casing is cut away on the side opposite the flat section of the base 5 to receive and mount a section 9 of condenser coils, preferably ar ranged in three parallel vertical rows and continuously bent'back and forth so that the sections are parallelto each other, as shown in Figures 4 and 5.

Figure 5, illustrates the electrical connections from the conduit box 6 to the motor 3 and to the commercial line, also the operating connection between the motor 3 and the compressor unit 4. The low side of the evaporator 10, shown in Figure 2, from which the gaseous refrigerant is withdrawn is connected to the intake 11 of the compresser by a pipe 12 passing through aconnection mounted in the base which communicates with a pipe 13 discharging into the interior of the dome. The discharge side 14 of the compressor, not shown, is connected by a pipe 15 which passes through a connection mounted in the base and communicates with the upper end of the coils forming the condenser 9.

The lower end of this coil is connected by a pipe 16 which also passes through a connection mounted in the base to a liquid receiver in the form of a semicircular tank 17 mounted upon the interior of the base, one end of which communicates by a pipe 18 to convey the liquid refrigerant to the pressure side of the evaporator 10.

From the above construction it seems that.

the condenser and compressor are mounted as, a single complete unit upon a base which is readily connected to the evaporator unit irrespective of the position of the unit base or evaporator unit.

The operation of the motor andcompressor increases the temperature of the dome surrounding the same. It is preferable to provide the exterior of the dome 2 with a plurality of integral outstanding-radial fins 19 which dissipate the increased temperature imparted to the dome into the surrounding atmosphere. The heated air within the easing or jacket 7 surrounding the dome immediately rises and passes out through the opening 8 in the top. The condenser section 9 is in the form of a radiator coil set in one side of the casing Z and provides an inlet thereto so that, as the heated air arises within the jacket 7 a natural draft is set up through the coils of the condenser which rapidly condenses the compressed refrigerant therein to a liquid which liquid passes from the condenser coils 9 to the liquid receive 17 upon the under side of the base, and thence through pipe 18 to the evaporator 10, as needed.

It has been found that a condenser constructed in this manner and supported upon one side of the jacket or casing provides a very eflicient natural draft condenser requiring but a minimum condensing surface. It is obvious that a natural draft condenser does away with the fan or blower usually employed with the condensers for devices of this character, and also allows of theconstruction of a compact compressor-condenser unit so complete in itself that such a unit may be located wherever most desirable in relation to the ice box or cabinet.

What I claim is: v

1. In an electrically operated refrigerating machine, a combined compressor and condenser unit mounted upon a movable base irgcluding a compressor, an electric motor for operating the compressor, a pan mounted upon said base supporting said compressor and compressor motor, a dome mounted upon said pan enclosing said compressor and compressor motor, a casing mounted upon said base enclosing said dome and spaced apart therefrom provided with an-exit apertureincluding a compressor, an electric motor for operating the compressor, a pan mounted upon saidbase supporting said compressor and compressor motor, a dome mounted upon said pan enclosing said compressor and compressor motor, a casing mounted upon said base enclosing said dome and spaced apart therefrom provided with an exit aperture above said dome and an intake aperture at one side of said dome, an apertured condenser supported in and spanning said side opening whereby the heat generated by the operation of the motor and compressor sets up a natural draft through the condenser, and a receptacle for the condensed liquid carried upon said'base, and means communicating from the compressor to the condenser and from the,condenser to the said receptacle also supported upon said base.

3. In an electrically operated refrigerating WALTER W. WILLIAMS 

